[PATCH] libio: freopen of default streams crashes in old programs [BZ #24632]

[Andreas Schwab]

On Jun 03 2019, Florian Weimer <fweimer@redhat.com> wrote:

> 	[BZ #24632]
> 	* libio/libioP.h (_IO_JUMPS_FUNC_UPDATE): New macro.
> 	* libio/freopen.c (freopen): Use it.

Ok.

> diff --git a/libio/libioP.h b/libio/libioP.h
> index 66afaa8968..f17c6e68e4 100644
> --- a/libio/libioP.h
> +++ b/libio/libioP.h
> @@ -108,9 +108,14 @@
>    (IO_validate_vtable                                                   \
>     (*(struct _IO_jump_t **) ((void *) &_IO_JUMPS_FILE_plus (THIS)	\
>  			     + (THIS)->_vtable_offset)))
> +# define _IO_JUMPS_FUNC_UPDATE(THIS, VTABLE)				\
> +  (*(const struct _IO_jump_t **) ((void *) &_IO_JUMPS_FILE_plus (THIS)	\
> +			    + (THIS)->_vtable_offset) = (VTABLE))

Misaligned line.

Andreas.

-- 
Andreas Schwab, SUSE Labs, schwab@suse.de
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